The design of Ka band filter with active space mapping algorithm

On the Alignment of Low-Fidelity and High- Fidelity Simulation Spaces for the Design of Microwave Waveguide Filters

“…The first iteration gives the result already discussed. 17 We therefore start from the result of the first iteration, and recover the response shown in Fig. 35 and we apply the Broyden formula.…”

“…Comparing this result with the previous result using the identity mapping matrix for all the iterations, updating the space mapping matrix with the Broyden formula requires one more optimization step to recover the desired response. 17…”

“…Note that, in this case, the I/O waveguide is the standard WR-51 and rounded corners of radius 2 mm have been considered. 17 The filter structure in the LF space is shown in Fig. 41 (with sharp corners) and its performance in Fig.…”

“…We now perform again the same basic ASM design procedure, but, this time, we update the space mapping matrix with the Broyden formula. 17 We can start with the second iteration of the process. Figs.…”

“…Furthermore, several contributions have been recently published with the aim of reducing the number of ASM iterations (and the related cost) by focusing the efforts on improving the parameter extraction optimization algorithms ( [9] to [11]), on refining the fine models employed (even using measured data) [12], [13], and a variety of other techniques ( [14] to [17]). The practical usage of all these advances with different types of microwave filters can be found in [18].…”